CVE-2026-89761Medium· 5.5▾ SunlitA flaw was found in the Linux kernel's AppArmor security module. An out-of-bounds write vulnerability exists when null terminating a label vector due to improper memory allocation. An unprivileged local attacker can exploit this by writing…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
— → 6.5
none → medium
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none → medium
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none → high
7.8 → 6.5
high → medium
6.5 → 7.8
medium → high
Last analysed / modified upstream
7.8 → 5.5
high → medium
A flaw was found in the Linux kernel's AppArmor security module. An out-of-bounds write vulnerability exists when null terminating a label vector due to improper memory allocation. An unprivileged local attacker can exploit this by writing to specific system files, potentially leading to a denial of service (DoS) or, in some cases, privilege escalation. This vulnerability requires an AppArmor policy to be loaded on the system.
kernel: apparmor: fix out-of-bounds write when null terminating a label vec — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-21.
Not affected:
Refer to the advisory for fix availability.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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